Ring 2 battery won't charge. Been on charge for 2 days and still nothing

Hi. My ring 2 battery is only 5 weeks old and says 5% charge. I tried charging using usb cable and usb plug for 12 hours and now the battert syas 2%. The amber and green lights are still on. Tried 3 differemt usb plugs and cables and still wont charge. can someone please help. Thanks